Dentosphere : World of Dentistry

# Egg shaped pontic is indicated for the replacement of: A. Mandibular posteriors B. Mandibular anteriors C. Maxillary posteriors D. Maxillary anteriors # A pontic as compared to a missing posterior tooth should be: A. same dimensions as that of natural teeth B. same dimensions mesiodistally but less faciolingually C. same dimensions faciolingually but less mesiodistally D. larger than natural tooth, to exert same forces on mastication # Which of the following will primarily determine the faciolingual dimension of the occlusal portion of a hygienic pontic? A. The length of the pontic B. The masticatory force of the patient C. The position of the opposing contact areas D. The width and crestal position of the edentulous ridge

# The current “gold standard” for predicting the malignant potential of the precancerous lesions is the: A. presence & degree of dysplasia B. presence of candidal hyphae C. presence of red areas in the lesion D. site of the lesions # Which of the following viruses is not an oncovirus? A. Herpes Simplex Virus B. Human Papilloma Virus C. Varicella zoster Virus D. Epstein Barr Virus # Which type of inflammatory cells predominate in the infiltrate of invasive carcinoma? A. Monocyte B. T lymphocyte C. CD 8 lymphocyte D. Langerhan's cell # The fixation of lymph nodes to adjacent tissues in cases of malignancy is due to: A. Secondary infection B. protective mechanism of body C. invasion of malignant cells through capsule D. matting of lymph nodes # Which of the following is not a Tumor suppressor gene? A. p53 B. p161NK4A C. bcl – 2 D. FHIT (fragile histidine tri...

# Cotton Wool appearance on a radiograph may be indicative of: A. Acute suppurative osteomyelitis B. Chronic suppurative osteomyelitis C. Diffuse sclerosing osteomyelitis D. Proliferative periostitis # Lues maligna is a form of: A. Severe malignant melanoma B. Lyell's disease C. Secondary syphilis D. Hansen's disease

Orthodontics (Greek. orthos = correct; odontos = teeth) is that branch of dentistry concerned with prevention, interception and correction of malocclusion and other abnormalities of the dento-facial region. The term 'Orthodontics' was first coined by le Felon.

Every dentist examines a number of  patients each day and gains more and more the clinical skills required for diagnosis and gains insight to distinguish between the conditions that appear very similar to each other clinically and are confusing to a neophyte in the field of dentistry. You must have heard the saying "The eyes only see what the head knows" as a student which is true indeed. A good knowledge of the condition, its manifestations, signs and symptoms are vital to make a differential diagnosis pointing towards the correct direction. Even the general public these days believe that  older the doctor, the lesser the lab investigations he needs and demands before making a diagnosis. What are your opinions about that ? Please Share your interesting / most difficult / most frightening / most challenging / unforgettable/ potentially fatal cases you've managed so far and share your feelings during the procedure, after completing it, and the lessons you learnt. You c...

TYPES OF DENTITIONS Monophyodont Presence of only one set of dentition for entire life.  Diphyodont • Presence of two sets of dentition  • Human beings are diphyodonts  Polyphyodont Presence of more than two sets of dentition.  Homodont All the teeth have same shape without distinction such as incisors, canines, premolars and molars.  Heterodont Presence of different groups of teeth.  Bunodont • Primitive type of teeth seen in primates like cats, dogs, etc.  • Contains simple conical cusps.  Haplodont • Seen in reptiles like crocodiles.  • Simplest cone form of teeth with single root. • Only simple hinge movements of jaws are seen.  Triconodont • Seen in early mammals.  • Three cusps are arranged in line with the largest cusp in the center. Tritubercular stage • Three cusps are arranged in triangle form.   Quadritubercular stage • 4th cusp is for...

# The average root surface area of maxillary first molar is (in mm2): A. 133 B. 233 C. 333 D. 433 # The average root surface area (mm2) of the maxillary second premolar is: A. 234 B. 220 C. 273 D. 204